• Meghan Markle and Prince Harry now have a "so be it" attitude after staying silent for so long, a royal biographer says
  • Omid Scobie believes the Duke and Duchess of Sussex will be "extremely candid" in their interview with Oprah Winfrey
  • The Sussexes' lives were made difficult by "leaks" from royal aides and courtiers, Scobie said

Meghan Markle and Prince Harry will get "extremely candid" about the events that led them to step back from royal duties and leave the U.K. last year in their upcoming chat with Oprah Winfrey, a royal biographer says.

Omid Scobie, co-author of the Sussex biography "Finding Freedom," recently dished on what royal watchers and fans can expect from Markle and Prince Harry's highly anticipated sit-down interview that is set to air this Sunday.

"Oprah's been there through this journey, so she knows exactly the questions to ask and who caused the problems for Harry and Meghan. I think Harry and Meghan will be extremely candid in the things that they share," Scobie told Entertainment Tonight via Zoom about the interview.

The royal correspondent explained that the Duke and Duchess of Sussex's issues lie more in "the institution of the monarchy" rather than Queen Elizabeth II and the rest of the royal family. However, this doesn't take away from the fact that "their lives were made extremely difficult" when they were still working royals, Scobie said.

"There were leaks from various royal aides and courtiers that often ended up in the British newspapers, causing a lot of pain, a lot of difficulty for them. We never heard them speak," he explained.

"This is the first time that we really get to hear [about] the emotional turmoil and difficulty that came from those very dark days as working members of the royal family," he added.

Scobie noted that at this point, Prince Harry and Markle "feel they have nothing to lose." He believes the royal couple has "sacrificed so much to find a space that they can thrive in" and has had enough of what the world says about them. They now have a "So be it" attitude after staying silent for so long, the biographer added.

The Duchess of Sussex had commented on how she feels about the palace hearing her speak her and Prince Harry's truth in the teaser of her upcoming interview with Winfrey.

Markle said if The Firm had played an active role in perpetuating falsehoods about them and if her speaking up comes with the risk of losing things, she no longer cares because "there's a lot that's been lost already.”

Prince Harry and Markle’s sit-down interview with Winfrey is set to air on Sunday at 8 p.m. EST/PST on CBS.

Prince Harry and Meghan Markle
LONDON, UNITED KINGDOM - NOVEMBER 11: Meghan, Duchess of Sussex and Prince Harry, Duke of Sussex attend a service to mark the centenary of the Armistice at Westminster Abbey on November 11, 2018 in London, England. The Armistice ending the First World War between the Allies and Germany was signed at Compiègne, France on eleventh hour of the eleventh day of the eleventh month - 11am on the 11th November 1918. This day is commemorated as Remembrance Day with special attention being paid for this year's centenary. Max Mumby/Indigo/Getty Images